Business Segment and Geographic Information (Operations by Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended										12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 147,724		$ 163,052	$ 153,495	$ 146,640	$ 136,231		$ 142,820	$ 132,452	$ 125,979	$ 610,911	[1]	$ 537,482	[1]	$ 498,761	[1]
Long-Lived Assets	286,987	[2]				304,773	[2]				286,987	[2]	304,773	[2]	307,346	[2]
United States [Member]
Segment Reporting Information [Line Items]
Net sales											128,186	[1]	118,263	[1]	115,035	[1]
Long-Lived Assets	70,532	[2]				64,545	[2]				70,532	[2]	64,545	[2]	64,845	[2]
Asia [Member]
Segment Reporting Information [Line Items]
Net sales											324,643	[1]	275,969	[1]	250,682	[1]
Long-Lived Assets	71,661	[2]				68,613	[2]				71,661	[2]	68,613	[2]	69,830	[2]
Europe [Member]
Segment Reporting Information [Line Items]
Net sales											148,026	[1]	132,126	[1]	123,040	[1]
Long-Lived Assets	144,794	[2]				171,615	[2]				144,794	[2]	171,615	[2]	172,671	[2]
Other regions [Member]
Segment Reporting Information [Line Items]
Net sales											10,056	[1]	11,124	[1]	10,004	[1]
Long-Lived Assets	$ 0	[2]				$ 0	[2]				$ 0	[2]	$ 0	[2]	$ 0	[2]

[1] Net sales are allocated to countries based on the location of the customer.

[2] Long-lived assets are based on the location of the asset and are comprised of goodwill and other intangibles and property, plant and equipment.